0 Carol S Greenville, RI on May 03, 2012 Like Clip I have a rough cement slab, that is hard to clean. Can it be topped with a smooth coat & sealed? Need other ideas? Displaying 1 of 11 comments See All Comments Stone-Crete Artistry Burns, TN use a Laticrete product grout. do not get too wet when mixing the grout. this is if you were usinng tile. if using flagstone....use a regular 3:1 mortar to sand mix mixed like dough NOTE: You can drag and drop your photos to reorder them Required Comment Saving...